40044121 has 8 divisors (see below), whose sum is σ = 43832264. Its totient is φ = 36357120.

The previous prime is 40044119. The next prime is 40044131. The reversal of 40044121 is 12144004.

It can be written as a sum of positive squares in 4 ways, for example, as 4044121 + 36000000 = 2011^2 + 6000^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40044121 - 2¹ = 40044119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40044095 and 40044104.

It is not an unprimeable number, because it can be changed into a prime (40044131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24456 + ... + 26041.

It is an arithmetic number, because the mean of its divisors is an integer number (5479033).

Almost surely, 2^40044121 is an apocalyptic number.

It is an amenable number.

40044121 is a deficient number, since it is larger than the sum of its proper divisors (3788143).

40044121 is a wasteful number, since it uses less digits than its factorization.

40044121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50571.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 40044121 is about 6328.0424303255. The cubic root of 40044121 is about 342.1208862123.

Adding to 40044121 its reverse (12144004), we get a palindrome (52188125).

It can be divided in two parts, 400 and 44121, that added together give a square (44521 = 211²).

The spelling of 40044121 in words is "forty million, forty-four thousand, one hundred twenty-one".